کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5440361 1398227 2017 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Novel coalescence-driven grain-growth mechanism during annealing/spark plasma sintering of NiO nanocrystals
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Novel coalescence-driven grain-growth mechanism during annealing/spark plasma sintering of NiO nanocrystals
چکیده انگلیسی
A novel oriented attachment growth mechanism of nanograins has been suggested for spark plasma sintering and annealing of NiO nanopowder. A hierarchical microstructure built by cube-shaped nanograins was observed during pressure-less spark plasma sintering at temperatures above 1000 °C and when the powders were annealed in ambient atmosphere at and above 700 °C. Irrespective of the processing method used, a rotation assisted grain attachment of irregularly shaped nanocrystals results in such a microstructure with parallel epitaxy, twinning or line defects at the grain interface. The unique microstructural features and the governing factors for the attachment process have been discussed.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 37, Issue 15, December 2017, Pages 4973-4977
نویسندگان
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